Fire-alarm



(No Model.)

B. HARLEY FIRE ALARM. No 252.362. Patented Jan. 17,1882.

WITNESSES ZNVEWTOR I it UNITED STATES PATENT Orrren.

EDWARD EARLEY, OF NEWTON, IOWA.

FIRE-ALARM.

SPECIFICATION forming part of Letters Patent No. 252,362, dated January 17, 1882.

i Application filed November 11, 1881; (No model.)

To all whom it may concern Be it known that I, EDWARD EARLEY, of Newton, in the county of Jasper and State of Iowa,.have invented certain new and useful Improvements in Fire and Burglar Alarms; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appeitaiu's to make and use the same, referencebeinghad to the accompanying drawing, which forms a part of this specification.

This invention relates to an improved automatic fire and burglar alarm for buildings,the construction and operation of which will be hereinafter fully described with reference to the drawing, which represents a sectional view ot'a building to which my invention has been applied.

A in the drawing represents the building, and B is an alarm-bell, or other suitable alarm mechanism, located in one of the bed-rooms, or at any suitable point in the building where, when started, it cannot fail to attract attention. Said alarm, which may be operated by springs, weights, or any other suitable power, is, when wound or set, held at rest by a lever, G, having a tooth, D, engaging one of the notches in a cog-wheel, E, upon the main shaft F of the alarm. When the lever drops down to the position shown in dotted lines the cogwheel is released and the alarm sounded.

Attached to the outer or free end of the lever 0 is an inflammable cord, G, which passes over suitably-arranged pulleys or staples H,and is attached at'l to a second inflammable cord, J. The ends of the latter are made fast at two points, K K, and it is stretched over a system of pulleys or staples, L, so that it shall cross and recross all points in the building which are exposed to the danger of fire or the invasion of burglars, or both. The said cords must be stretched perfectly taut, so as to keep the lever O in engagement with the alarm mechanism, and to take up any slack caused by expansion of the cords. I suspend upon cord G a weight, M, heavy enough for this purpose.

The cord, where it crosses windows, doors,

and other places exposed to the invasion of burglars, must be sufficiently frail to be ruptured in case it should be attempted to eflect an entrance into the building. On the other hand, at points where it is exposed to the ravmay be arranged in difl'erent parts of the building, thus simplifying the arrangement of the cords.

My improved fire and burglar alarm is simple, effective, automatic in its operation, and it may be put up ata comparativelytrifling cost.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- .1. In a fire-alarm, the combination of the cord J, arranged as described, the cord Gr, having its ends attached respectively to said cord J and to theQt'ree end'of a weighted lever, 0, having tooth D, and a suitable alarm mechanism having toothed wheel E, held inactive by said lever 0 when cord G is taut, substantially as set forth.

2. In a fire-alarm, the combination of the cord J, arranged as described,thecord G,having its ends attached respectively to said cord J and to the free end of a weighted lever, 0, having tooth D, a suitable alarm mechanism having toothed wheel E, capable of being held inactive by the said cord G, and a weight, M, suspended upon the latter, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presenceof two witnesses.

EDWARD EARLEY.

Witnesses:

JOHN (3. WILSON, THOMAS H. PORTER. 

